FOSSIL FLORA OF THE STAFFORDSHIRE COAL FIELDS. 



65 



Features of the North Staffordshire Coal Fields," &c), the following divisions are 

 adopted * : — 



Formation. 

 New Red Sandstone or Trias. 



Permian Rocks. 



Carboniferous Rocks. 



i 



Division. 

 Bunter. 



Upper. 



Lower. 



J 



Subdivision. 

 Pebble Beds. 

 Red Marls. 

 Red Sandstone. 



1. Upper Coal Measures. 



2. Middle Coal Measures. 



3. Lower Coal Measures. 



4. Millstone Grit. 



5. Yoredale Rocks. 



6. Carboniferous Limestone. 



These are the divisions of the Coal Measures adopted in this communication, — the 

 Potteries Coal Field being one of those in which the three divisions of the Coal Measures 

 occur, as developed in Britain, t 



The Upper Coal Measures of the Potteries contain little coal, but yield some valuable 

 beds of Black Band Ironstone. 



The following section shows the position of the various Coal Seams and Ironstones : — 



General Vertical Section of the North Staffordshire Coal Field, adopted, vrith slight 

 modifications, from that issued by Mr Homer, 



X 



o 



OS 

 <M 



o 



C3 



a 



' Red and Purple Marls of uncertain depth 

 Strata, 



Half Yards Ironstone and Coal, 



Strata, 



Red Sliagg Ironstone and Coal, 



H 4 



J 

 ■4 

 o 

 O 



« 

 Oj 



Ironstone, 1' 6" to 5' 6", 

 Coal, 



Gutter Stone, 



Gutter or Fen ton Low Coal, 



Strata, 



Ironstone, 

 Coal, . 



I Oil Shale, 

 Top Red Mine Ironstone and Coal, -| Ironstone, 



( Coal, 

 Strata, 



Shale, Metal and Fire Clay, 

 Strata, 



Coal, 



Dirt, 



Hoo Cannel, ■{ Bass, 



Ironstone, . 

 Bass, 



Strata, ....... 



^Spirorbis Limestone, 12 yards above Bassey Mine Ironstone, 



* Log. tit, p. 4. 



t In regard to the Lower Coal Measures in the above Table, Mr Ward divides this series into two subdivisions — 

 an Upper and a Lower group. The "Upper" group contains the principal seams of coal used for domestic and manu- 

 facturing purposes, and includes the whole of the measures occurring between the Ash or Rowhurst and the Winpenny 

 coals. The " Lower " series consists of dark shales, sandstones, and purple-coloured rocks, with occasional grits and 

 conglomerates. It includes four or five thin coals of little commercial value. Each group is distinguished by a distinct 

 series of coal beds, and equally well characterised by its organic remains. 



t " The North Staffordshire Coal Field, with the Ironstones contained therein," Trans. North Staffordshire Inst, of 

 Mining and Mechanical Engineers, vol. i. p. 102, 1879. 











Yards. 



Feet. 



Inches 





























199 



2 











saj 



r 





 



18 

 

 1 

 

 

 



17 

 

 

 

 6 

 3 



25 



3 

 ' 1 



2 

 1 

 1 



2 

 2 

 2 

 1 

 1 

 2 

 2 

 

 2 

 



6 

 8 

 

 8 

 

 

 3 

 3 

 

 6 

 6 

 2 

 

 2 

 



ards. 



Feet. 



Inches. 

















8 

















3 













1 



1 

















9 













1 



9 















1 

 10 



1 







6 

 





















2 



6 



